familycontrolserror code=2 on on child devices

I'm try to physical device always getting error on Error for Family Controls: Error Domain=FamilyControls.FamilyControlsError Code=2 "(null)"

AuthorizationCenter.shared.requestAuthorization { result in                  switch result {         case .success():           break         case .failure(let error):           print("Error for Family Controls: (error)")         }

familycontrolserror code=2 on on child devices
 
 
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